Fix #800 (and add error msg in a nasty catch and ignore)
Version: Releasing version 2.4.1
Core: JRE should not be in our build path
GoogleServices: Library update.
integration of google analytics within droidplanner.
fixed issues preventing google analytics from dispatching recorded hits.
cleaned up the styles resource file.
added preference to disable usage statistics reporting.
added 'up' navigation button to the settings screen.
Added 'mode details panel' usage tracking.
created package for analytics related code/logic.
added a Category enum to store all analytics related categories.
Merge pull request #813 from arthurbenemann/feature_analytics

Feature analytics
Merge branch 'master' into zmqFix

Conflicts:
	Android/build.gradle
Merge pull request #814 from arthurbenemann/zmqFix

Fix #800 (and add error msg in a nasty catch and ignore)
Version: Releasing version 2.4.2
Preferences: Have logging enabled always.
Preferences: Automatic format by eclipse
Preferences: Shuffling preference items around to close #809
Merge pull request #815 from arthurbenemann/issue809

Issue809
USB: Adding support for direct connections to the Pixhawk.
Merge pull request #816 from arthurbenemann/pixhawkUSBdirect

USB: Adding support for direct connections to the Pixhawk.